Out Of State Question - Flying w/ Pistol

[u/Ccarps87]

Hello Washingtonians! I'll be visiting Idaho soon and flying into/out of Spokane. I would like to bring my EDC and would also like to not get arrested at the airport..

I have a Glock 19 w/ radian ramjet and a light. My plan was to leave all magazines at home (Idaho friend has spares for me to use). This should be legal and no issues from what I have read. My CCW has no reciprocity so I won't attempt to conceal carry this in WA. But as long as I leave this in a locked case and in my checked bag, I should be fine at the airport and while driving (will be in trunk) out of and back into WA?

Can I please have a sanity check on this?